mark williamson design
23m Expedition Yacht
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Principal Data
Length Overall
23.00 metres
Length WL
20.80 metres
Beam
6.20 metres
Draft
1.6 metres
Construction
Aluminium
Main Engines
2 x YANMAR 6LY2ASTP 440HP @ 3300rpm
Gearbox
TD MG506-1 (Ratio 2.96:1)
Propulsion
2 x 26" fixed pitch five-blade propellers
Auxiliary
Cummins 4BT 3.9G2(M) / UCM 224E 60kVa
Maximum Speed
18 knots
Cruising Speed
13 knots
Fuel Capacity
14,500 litres
Range
1150 nautical miles
Freshwater
2600 litres
Berths
12 Guests
5 Crew
Profile, Plan and End Elevation
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General Arrangement
download ga in pdf format (283kB) 23ey-ga.pdf
Vessel Description
VESSEL TYPE: Aluminium semi displacement hard chined monohull
SURVEY AND CLASSIFICATION:
DNV 1A1 HSLC R2 , shall comply with the requirements of Queensland Survey USL 2B
STRUCTURE:
Materials (to be inspected as required by Survey Authority and Owners Representative):
Sheet and Plate - Grade 5083-H321, H116, 5086-H32
Extrusions - Grade 6061-T6, 6082-T5
Filler Wire - Grade 5356
Castings - Grade CC601-T1
All welders to be approved by the Survey Authority.
OUTFIT AND FINISHING: The vessel shall be laid out as per the general arrangement drawings and all fittings and equipment required for the operation of the vessel shall be supplied.
LAYOUT
Main Deck: Dining area, galley, ships office / captains cabin, wheelhouse
Main Deck Aft: Lounge, Engine room access
Main Deck Fwd : Crew accommodation, 4 x single berths, Separate toilet and shower, washer/dryer.
Lower Deck: Guest Accommodation. 6 x Double berths with ensuite
FITOUT
Floors: 6mm Timber flooring
Linings: Sides Aluminium honeycomb panels (Ayrlite)
Bulkheads Aluminium honeycomb panels (Ayrlite)
AIR CONDITIONING SYSTEM: Reverse cycle system is based on an water cooled compressor unit linked up to a multiple number of fan coil units. Design of the system shall be based upon an ambient operating temperature of 35°C (98% RH) and sea water of 30°C. Crew spaces to be cooled/heated to 21°C (50% RH).
NAVIGATION and COMMUNICATION EQUIPMENT:
Furuno
Model 1510 15” Radar with 6ft antenna 15mtr cable ARP17 Plotter GCY8 Gyro
converter
JMC
1400 Dual frequency sounder 50/200 1kw
JMC
NP-30NT with GPS ANTENNA
ICOM-IC-M700
complete with tuner and Banten HF antenna
Icom
IC-M502 VHF Radio with Banten antenna
Sailor
C2906 Inmarsat C VMS unit
KVH
Trac phone Inmarsat M
Navicontrol
Autopilot 3003 Gold with second station
Cetrek “Poseidon” compass
Den Haan DHR CS-220 Searchlight
Closed circuit TV monitoring of engine room and main deck. All navigation equipment interfaced to Flying Bridge displays.
